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西南喀斯特农村降水化学研究:以贵州普定为例
引用本文:吴起鑫,韩贵琳,陶发祥,唐杨.西南喀斯特农村降水化学研究:以贵州普定为例[J].环境科学,2011,32(1):26-32.
作者姓名:吴起鑫  韩贵琳  陶发祥  唐杨
作者单位:1. 中国科学院地球化学研究所环境地球化学国家重点实验室,贵阳550002;中国科学院研究生院,北京100049
2. 中国科学院地球化学研究所环境地球化学国家重点实验室,贵阳,550002
基金项目:国家重点基础研究发展规划(973)项目(2006CB403206); 中国科学院知识创新工程重要方向项目(KZCX2-YW-306); 国家自然科学基金项目(40973088)
摘    要:对我国西南喀斯特地区农村(普定)2008年的降水样品化学组成研究表明,该区降水pH值在4.6~7.1之间,加权平均值为5.7.Ca2+是主要的阳离子,雨量加权平均浓度为303.2 μeq·L-1占阳离子总数的34%~88%;SO42-和NO3-是主要的阴离子,雨量加权平均浓度分别为281.2 μeq·L-1、69.9 ...

关 键 词:喀斯特  农村地区  降水  水化学  来源分析  贵州
收稿时间:2010/2/18 0:00:00
修稿时间:7/8/2010 12:00:00 AM

Chemical Characterization of Rainwater in a Karst Rural Site: A Case Study of Puding, China
WU Qi-xin,HAN Gui-lin,TAO Fa-xiang and TANG Yang.Chemical Characterization of Rainwater in a Karst Rural Site: A Case Study of Puding, China[J].Chinese Journal of Environmental Science,2011,32(1):26-32.
Authors:WU Qi-xin  HAN Gui-lin  TAO Fa-xiang and TANG Yang
Institution:WU Qi-xin1,2,HAN Gui-lin1,TAO Fa-xiang1,TANG Yang1,2(1.State Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550002,China,2.Graduate University of Chinese Academy of Sciences,Beijing 100049,China)
Abstract:Rainwater samples of a karst rural site in Puding County, Guizhou Province, China over a period of one year (2008) were collected and the major ion concentrations were measured. The pH of samples varied from 4.6 to 7.1 and volume-weighted mean was 5.7. Ca2+ was the dominant cation in rainwater and volume-weighted mean was 303.2 microeq x L(-1). It accounted for 34%-88% of the total cations in the studied rainwater samples. SO4(2-) and NO3- were the main anions, and their volume-weighted mean were 281.2 microeq x L(-1) and 69.9 microeq x L(-1), respectively. The sum of SO4(2-) and NO3- accounted for 63%-93% of the total anions in the studied rainwater samples. Investigations of fractional acidity (FA), neutralization factors (NF), and correlation coefficients among ionic constituents indicated that high pH values were controlled by the neutralization caused by the alkaline materials but not by the absence of acidic materials. Studies of the origins of major ions showed that Ca2+ was from the terrestrial source, e. g. crustal dust and human activities, and NH4+ and K+ were from the soils and human acidities, while SO4(2-) and NO3- were mainly originated from anthropogenic sources.
Keywords:karst  rural area  precipitation  chemical composition  source  Guizhou Province  
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